/Engine/Plugins/Enterprise/GLTFExporter/Source/GLTFExporter/Public/Builders/GLTFConvertBuilder.h
[FGLTFJsonMaterial](API\Plugins\GLTFExporter\Json\FGLTFJsonMaterial) * AddUniqueMaterial ( const [UMaterialInterface](API\Runtime\Engine\Materials\UMaterialInterface) * Material, const [USkeletalMesh](API\Runtime\Engine\Engine\USkeletalMesh) * SkeletalMesh, int32 LODIndex, int32 MaterialIndex )